MSQ

[Iscah]

G'raha has proven useful even up to 5.5's story, so I think it's a wise decision for them to use G'raha instead of having to come up with other means to continue the story.

That's my point though - still have him there with the knowledge and resources that the Exarch picked up, but talking about him like it's a separate person whose mind he knows very well.

So instead of "I learned how to do this back in the Crystarium" he'd say "the Exarch knew how to do this".

You'd even maintain the fanboying-over-future-historical-figures thing because he still has that information about them, just received secondhand.